uprobes: use kmap_local_page() for temporary page mappings

Replace deprecated kmap_atomic() with kmap_local_page().

Signed-off-by: Keke Ming <ming.jvle@gmail.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Oleg Nesterov <oleg@redhat.com>
Link: https://patch.msgid.link/20260103084243.195125-6-ming.jvle@gmail.com

diff --git a/kernel/events/uprobes.c b/kernel/events/uprobes.c
index d546d32390a81def1f103a29bf90df7b8cba6f99..a7d7d83ca1d78992cd0b01dd132a803509c5d15c 100644 (file)
--- a/kernel/events/uprobes.c
+++ b/kernel/events/uprobes.c
@@ -179,16 +179,16 @@ bool __weak is_trap_insn(uprobe_opcode_t *insn)
 
 void uprobe_copy_from_page(struct page *page, unsigned long vaddr, void *dst, int len)
 {
-       void *kaddr = kmap_atomic(page);
+       void *kaddr = kmap_local_page(page);
        memcpy(dst, kaddr + (vaddr & ~PAGE_MASK), len);
-       kunmap_atomic(kaddr);
+       kunmap_local(kaddr);
 }
 
 static void copy_to_page(struct page *page, unsigned long vaddr, const void *src, int len)
 {
-       void *kaddr = kmap_atomic(page);
+       void *kaddr = kmap_local_page(page);
        memcpy(kaddr + (vaddr & ~PAGE_MASK), src, len);
-       kunmap_atomic(kaddr);
+       kunmap_local(kaddr);
 }
 
 static int verify_opcode(struct page *page, unsigned long vaddr, uprobe_opcode_t *insn,
@@ -323,7 +323,7 @@ __update_ref_ctr(struct mm_struct *mm, unsigned long vaddr, short d)
                return ret == 0 ? -EBUSY : ret;
        }
 
-       kaddr = kmap_atomic(page);
+       kaddr = kmap_local_page(page);
        ptr = kaddr + (vaddr & ~PAGE_MASK);
 
        if (unlikely(*ptr + d < 0)) {
@@ -336,7 +336,7 @@ __update_ref_ctr(struct mm_struct *mm, unsigned long vaddr, short d)
        *ptr += d;
        ret = 0;
 out:
-       kunmap_atomic(kaddr);
+       kunmap_local(kaddr);
        put_page(page);
        return ret;
 }